Thanks mate.
The information here is simply amazing.
I checked out your other post on tires as well. These are things I was wondering about just a few days ago.
I haven't gotten to animation yet. I built a static nose gear assembly for an F9F last week. It came out looking good, but it didn't move at all. Just an exercise I did learning basic modifiers, etc.
So far I haven't tried to animate anything I have worked with. I haven't even saved anything, LOL.
The links you posted are all saved now too

They have me wondering about other things, but I have a feeling I can find most answers.
maybe it is getting time I tried to make something move.
The community is really great about showing how to do things. Man I am getting into this.
I have no cad skills, but finding gmax very understandable. I am
kinda on the right track. It is post like yours that I am finding sooooo helpful. Thank you.